Mining machine



1E. J. DOBERSTEW MINlNG MACHINE w23 3 Sheets-Sheet 2 Filed Nov. 8v

x wwW//J j foemmw LIL Nov. 4, wm. Mmmm E. J. DOBERSTIEHN MINING MACHINE Filed Nov. a` 1923 5 sheets-sheet s" Patented Nov. 4,

PATENT FFICE.

Application filed November 3, 19%.

To all whom it may concern.'

Be it known that l, EDWARD d'. Dosensrniir, a citizen of the United Mates, residing at Blue island, in the county of Goolt and State et illinois, have invented a new and useful Improvement in Mining Ma chilies, oit vvhich the it'ollovving a speci` iication.

rl`his invention relates to improvements in hert cutting mining machines and his for its principal object to provide a neuT and improved device of this di-iscription, capable ot beingeasily and quickly handled during its cutting,l operation and during its move ment from place to place.

In carrying out my invention li provide a powerdriven lieri cutting; element permanently supported on a wheel. truck, pret erably ior movement on the mine traclr. The cutting;` elenfient is mounted on a pivotal turntable so that it may be supported te `swingangularly on both sides et the truck to eut a hert in advance oit the machine. Means are turther provided tor raisin s; and lowering` the cutting element and turntable to various elevations with respect to the truck so as to cut at various heights.

More particularly, the object et the present invention is to provide an improved arrangement oit turntable and elevatingu mechanism 'whereby the cutting mechanism may be lowered to require a-minimum overall height et the apparatus While beine; moved trom place to place in the mine, and 'lurther to provide maximum rin lity between the cutting,` element and the truck.

The invention may best be understood by reference to the accompanyinai drawings in which:

Figure l. is a central iongitudinal section ot a mechanism constructed in accordance with my invention, but with the cutting' element shown in side elevation. lin this view the elevating mechanism and cutting, ele ment are shovvn in 'full lines in their lovvermost position, and in dotted lines in their raised position. y

Figure is a plan view oit' the truclt with the cutting,` element removed therefrom and with parts broken away to shoiv details oit the elevating mechanism.

Serial No. 673,426.

Figure 3 is a transverse sectional vieW talren on line 3--3 of Figure 2.

Figure d is a detail showing the ratchet device for operating the elevating mecha nism.

iigure 5 is an enlarged 'View ot the Gushion springs and associated parts ot the elevatinpv mechanism.

ln the form in Which my invention is embodied, as illustrated in the drawings, the cutting` element l0 is mounted on a truck trame 1l having Wheels l2, i2 preferably adapted tor engagement with the track 13, 13. The cutting element may be ot any suitable construction, including` a ltert cutting device, draft device, and a motor ior operating Vtliese devices. As herein shown, ft ypieter to use tor the cutting element a short Wall miningv machine of a Well known type, having,l as its main elements a torivardiy prfjijecting cutter arm 14tprovided 1l a cutter chain, not shown, and With suitable windinp,1 drums indicated at 16. The motor, having` suitable operative connections, is mounted in the casing,1 18 on the cutting` element. Details ott the motor and operargive connections need not be de scribed as they term no part of the present inveifition.

The standard cutting; element l0 is car! ried at all times `on the truck. While the machine is being,` transported from place to place the cutting` element is arranged lon- ,egitudinally ot the truck body, as shown in Figures l and'2, and with its motor in operative connection with the truck Wheels l2, l2 by means of a detachable driving connection ott any suitable term. is shown herein, this connection includes a driving pin l5 detachably engaged in a socket mem br Q6 to be driven by the mining` machine motor. The pin l5 is operatively connected to the supporting wheels l2, 'l2 ot the truck by any suitable mechanism, which may include a driving,` chain 27 and sprockets 32, 33, the latter sprocket being carried on the rear trucir Wheel. When cutting; a hert the cutting' element is arranged to swing angu larly about a fined pivot on the truck traine. Details ot the construction of the pivotal mounting` tor the cutting1 element are shown in Figures 1 and 3. The base plate 19 of the cutting element rests upon and is sen cured to a plate 2O forming the turntable upon which the cutting element swings. A stud 21- projects from the bottom surface of 4said plate and has pivotal bearing in a socket 22. VThis socketis secured to a longitudinally extending supporting plate 23.".Thefipivotal stud 21 yis preferably arranged substantially in alignment with the center of gravity of the cutting element so'that the latter will be substantially balanced on the supporting plate" 23 Vwhile it `is swung there/about. An annular bearing ring"24`,` herein'icomprising segmental sec- .tions 24:, '24?, is fixed to the supporting plate ,23concentric with the stud 21 to pro- /toggle device *havingl as its principal elements two pairs and 35a, 35apivotally 4, connecting ythe bed plate 23 in the truclr Y f frame llfatfthe front and rear, respectively'.

lleffron'ttoggle members 35, 35 are connecte'dto the supporting plate 23 by pivotpins 136,36, and .to the base plate 31 of the A L.truck by pivot pins 37,37. Similarly, the

yrear ytoggle members are connected to the `supporting plate23 and base plate 31 by @pivot pins 36a and`37a, respectively. A pair of longitudinally movable toggle members 38,38 .are adapted to coact with the toggle members 35,'.3'35 and 35, 35a, to raise the bedpl'ate and ,cutting element as indicated Vini dotted lines in Figure 1.

Said toggle Inembersare equal in'length and the pairs thereof are arranged parallel with earchV other, so that `the cutting element will be Vmaintained in parallel vrelationship with the' truck .frame in yally relative positions thereof. llhetoggle members 38, 38 are pivotally connected'attheir forward and upper ends to ,the"bedfplate 2 3, as for instance, on two pivotpins",29, 29, and at their lower and vrear ends toa movable head 30 `of a ratchet V device, such asa lifting jack 39, lying boeil Zontally ofthe base plate 31 and having its .foot fi() 'engaging stop 41 at the rear of tflieitriiek frame 11. Said ratchet device may vbe of yany approved pattern and may be i securedin place by a. clamp 42 attached to l the truck `frame 11.

The arrangement is such ,that the entire bed plate 23, turntable I2Odand. cutting mechanism may be swung upwardly and forwardly about the pivotal fr members 3.5, 35 andy 36, 36, by actuating the ratchet mechanism of the liftingy jack 39.

...Details 'of the ratchet mechanism in the 39 .are shown in `Figure fl, as herein shown comprising a standard form of jack operating mechanism including a toothed rack member 4:3, a stationary pawl 4A and an operating pawl movably mounted on a lever arm 45. In the present instance I provide means Yfor operating this lever arm comprising a rod 46 pivotally connected to said arm at 47 and extending .longitudinally to the rear end of the truck where it is pivotally connected to a lever arm 478 pivotally connected at 49 in an upright posi.- tion where it may be manually manipulated by an operator standing at the rear end of the truck. In order to afford suflicient movement of the parts the rack member 43 is made longer than is usual in ordinary jacks, herein extending through the foot 40 when the elevating mechanism is in its lowermost position as in Figure 1.

In order to provide the required rigidity of the elevating mechanism, I provide a plurality of guide plates 50, 50 secured in bearing engagement adjacent each of the toggle members 35, 35 and 35, 35a. These bearing plates preferably are arranged in pairs on both sides of each pivotal member, as shown, and extend a little short of half the .length of the respective members, their outer margins 51 being curved on a radius, as clearly shown in Figure 1. The arrangement is such that these guide plates provide a rigid lateral support lfor the toggle members 35, 35 and 35, 35a, in all relative positions of the elevating mechanism.

In conjunction with the elevating mechanism I provide tension means for cushioning the downward movement and assisting the initial upward movement of the elevating mechanism. This means, in the present inl vention, is suspended below the base plate 31 of the truck frame 11 and between the wheels 12, 12 thereof, so as to permit the elevating frame, and especially the relatively lonf)- pivotal bearing including the journal 22, to be lowered as far as possible and thereby afford a minimum. overhead clearance of the entire machine. As shown l1erein this tension means comprises a pair of springs 52, 52 housed in a casing 53 below the bed plate 31 of the truck frame 11, so as to be below the path of movement of the movable head 3() of the ratchet device 39. The rear ends of said springs are engaged with a stationary` stop 55 and the forward ends thereof engage a movable cross member 56. This cross member is connected with lli i ,transfithat the cross member 58 is engaged by 'the stop 59 on the movable head 3U only when the elevatin,an mechanism. is at or near nts lowermost position. ldhen said elevati p, plate is in its lowermost position, as shown in full lines in Figures l and 2, the springs 52, 52 are placed under compression and tend to counteract the weight oit the support and the cutting element thereon, thereby providing; a shoe-lr absorber to cushion the downward movement oli the support respective to the trame ll. The springs 52, 552 further assistin raising; the support and cutting,1 element from its lowermost position when the toggle members 38, 38 are nearest their horizontal position and the maximum amount of horizontal pressure is required :trom the jack in order to actuate the elevating;1 mechanism. l/Vhen the moving head 230 olf the jack is actuated. in raising the support, the cross arm 58 oit arms 5i', 5l' moves therewith until the limit ot movement of said arms is reached, as for instance, as apgainst a stop 60 on the base plate 31. Thereafter the cross arm. 5S becomes disengaged trom the moving head but remains in position to be rei-engaged thereby when the elevating; support again lowered.

lt will be observed that additional support is provided vtor the turntable and cutting' mechanfsm when in their lowermost I )osition on the truck by the guide plates 30, 50, l1 avinig bearing; engagement with the toggle members 35, and mounted on the bed plate 23 adjacent the pivotal point 3G, and by the guide plates 50, 50, havingl bearing engagement with the toggle members B53, 35, mounted on the bed plate adjacent the pivotal point 36, both pairs ot lunido plates enpagina` the base plate ill when the cutting,1 mechanism has been lowered. lliiltowise the guide plates 50, 50, havingr boaii'ing; engagement with the toggle members f5, 35, and mounted on the base plate. 3l adjacent the pivotal point 37a, engages the bed plate 23 when the cutting mechanism is in its lowermost positionu Although l have shown and described one :term in which my invention may be em bodied, it will be understood that the conA struction and arraniggement oi the parts may be varied without tleimrtiiig from the spirit and scope ot my inipfention. l do not, thereloro, wish to be understood as limitingl mysel't to 'the specific construction illustrated herein, enceptim.;l as speciiically limited in the appended claims.

ll claim as my invention:

l. ln a mining apparatus, the combination ot a truckA element, a cutting mechanism, a support elenient therefor, means vfor elevating; said support and cutting,I :mechanism coiuprisii1p,` a plurality olf pivoted links, and ,ejrlide means having; lateral engagement with said links mounted on one of said elements and adapted. to engage the other oli said elements when the support and cutting; i'nechanism is in its lowermost position.

El. ln a mining apparatus, the combination oit a wheeled truclr, a cutting); element, a support therefor, a centrally disposed pivotal mountinp; tor said (nittinp,v element er: tending,` below said support, means for elevating said cutting element, and tension means beneath the body ott the truclr coacting with the elevating means to retard the downward movement oit the support and assist its initial upward movement.

3. lin a mining apparatus, the combination oi a wheeled truclr, cutting element, means for elevating said cutting element, and a ratchet device operable from the rear end ci? said apparatus tor actuating, said elevati means.

1l. ln a mining apparatus, the combination oi truck element, a cutting mechanism, a support element therefor, means lor ele* vatinp; said support and cutting mechanism comprising a plurality ol pivoted links, and arcuate guide means for said linlrs having; lateral engagement therewith adjacent the .middle point 'thereof mounted on both oi said elements and adapted to engage the opposite element when the support and cutting mechanism is in its lowermost position.

5. lin a mining; apparatus, the combination olf a wheeled truck, a cutting element, a support therefor, means Yfor elevating said cutting' element comprising1 a. horizontally movable raclr member, and tension means comprising springs and a movable arm beneath the body of the truclr coacting` with the elevating means to retard the downward movement ont the support and assist its initial upward movement.

o. ln a mining,I apparatus, the combination ot a wheeled truck, a cutting element, a support therefor, a depending pivotal mountiup; on said support for said cutting element, means tor elevating said support and cutting,` element including a horizontally movable rack, and tension means movable parallel with but below the path of movement ci said rack whereby movement of said support is afforded to its lowermost position with its pivotal mounting disposed above said tension means.

i'. ln a` mining' apparatus, the combination of a wheeled truck, a cutting' element, a support therefor, means 'or elevating said support including a horizontally movable rash, tension means coacting with said rack lor a limited part ol4 its movement to retard the downward movement of the support and assist its initial upward movement.

lipgned at Chicago, in the county ol @ook and tltate ot illinois this 5th day o'l` lll'ovember, 1923.

EDWARD J. DOBERSIEIN. 

